1 Dietary seasonal variations in the Medieval Nubian population of Kulubnarti as 2 indicated by the stable isotope composition of hair 3 Walaa A. Basha,a* Angela L. Lamb, b Moushira E. Zaki,a Wafaa A. Kandeel,a Nagui H. Fares,c 4 Andrew T. Chamberlain.d 5 6 a Biological Anthropology Department, Medical research division, National Research Centre, Cairo, Egypt 7 b NERC Isotope, Geosciences Laboratory, British Geological Survey, Keyworth, UK 8 c Zoology Department, Faculty of Science, Ain Shams University, Cairo, Egypt 9 d School of Earth and Environmental Sciences, University of Manchester, UK 10 11 *Corresponding author. Tel.:+201023815246 12 E-mail address:
[email protected] 13 14 Abstract 15 Objectives: The island of Kulubnarti is located in Sudanese Nubia and contains two 16 cemeteries, named R and S, which are dated to AD 550-800. In order to provide more 17 detailed dietary information for this population and examine seasonality of diet, we 18 analyzed the carbon isotope composition of hair samples from both cemeteries. 19 Materials and methods: Forty seven separate hair samples from 8 adults, 29 adolescents, 20 7 infants and 3 individuals with unknown age were analyzed. Long hair samples were cut 21 transversely and divided into 2 cm longitudinal segments, to examine temporal variations 22 in the dietary carbon sources. 23 Results: The average carbon isotope value for the whole population was -17.95 ‰ 24 (SD=1.8). A significant difference between the two cemeteries was found with variances 25 in the amount of C4 dietary carbon sources consumed. 26 Discussion: The results of hair isotope compositions concur with previous soft tissue 27 investigations of Kulubnarti population which suggested that the dietary regimen contains 28 a mix of C3 and C4 plant-based sources.